Throw-out mechanism for polishing devices.



B. P. SWYERS.

THROW-OUT MECHANISM FOR POLISHING DEVICES.

APPLICATION FILED MAY 7. I9l5.

2 SHEETSSHEET FEG.3

WITNESSES .MM 4w. WM

INVENTOR coLummA PLANUGRAIH CO.,\VI\SHINGTUN. u. c.

B. P. SWYERS.

THROW-OUT MECHANISM FOR POLISHING DEVICES.

APPLICATION FILED MAY 1. 1915.

Patented Nov. 9, 1915.

2 SHEETS-SHEET 2.

la I /Z A L v21 2f '28 27 w HGA X5 #4- ,fi 5%?? FKG.-5

WITNESSES INVENTOR COLUMBIA PLANOGRAPH c0., WASHINGTON, u. c

BnIonr. SWYERS,

0F PITTSBURGH, PENNSYLVANIA.

THROW-OUT MECHANISM FOR POLISHING DEVICES.

Specification of Letters Patent.

Patented Nov. 9, 1915..

Application filed May 7, 1915. Serial No. 26,531.

To all whom it may concern:

Be it known that I, Baron P. SWYERS, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Throw-Out Mechanism for Polishing Devices; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention pertains to throw-out mechanism for polishing devicesi. e. to mechanism for throwing the polishing device out of operative position in case of an accident occurring to the member being polished.

It is the principal object of the invention to produce a simple and efficient mechanism which will automatically throw the polishing device out of operation, and thereby save it from damage, in case of an accident in connection with the polishing mechanism.

*Gther objects will appear from the following description, taken in connection with the appended claims.

I have shown in the accompanying drawings, and described in the following speoification, an embodiment of my invention as employed in connection with the polishing device forming the subject matter of mycopending application, Serial No. 671,833, filed January 18, 1912. It is to be understood, however, that the invention may be applied in other ways, and may be embodied in other forms, without exceeding the scope thereof, as defined in the appended claims.

In the drawings: Figure l is a side elevation of a rolling mill having applied thereto a polishing device of the kind disclosed in my co-pending application above referred to, such polishing device being equipped with a throwbut mechanism constructed in accordance with my invention; Fig. 2 is a sectional elevation showing the polishing device in a thrown-out condition; Fig. 8 is an enlarged sectional view showing the polishing device frame just about to snap away from the retaining rods; Fig. 4 is a detail view of the ratchet device, and Fig. 5 is an inverted plan of one of the retaining rods.

Like reference characters refer to like parts throughout the following specification and the several figures of the accompanying drawing.

eferring now to the drawings, the rolling mill comprises a pair of standards 10 in which are rotatably mounted the ends of the upper and lower rolls 11 and 12 respectively. Between the standards 10 is mounted a polishing device consisting of two arms 13 aivoted at their lower ends and connected by guide bars 1 1 and 15, which are located in operative relation with the upper roll 11 and the lower roll 12 respectively. The guide bars 14 and 15 have associated therewith emery blocks 17 and 18 which are automatically moved along the rolls during the rotation of the latter, thereby to carry out the polishing operation. A spring 19 is connected to one of the arms 13 and normally tends to pull the polishing frame away from the rolls. The polishing device referred to is fully described in my co-pendmg application above referred to, and a detailed description thereof here is therefore not necessary.

The polishing frame is held in operative position by means of connecting rods 20, one at each side of the rolling mill, which eX- tend across the top of the upper roll 11, close to the standards 10. Each of the connecting rods is provided with a vertical slot 21 therein, which receives the upper end 22 of the corresponding arm 13 of the polishmg device. Each connecting rod is also formed with a downwardly-extending hook 23 at its end, within which engages a stout outwaidly-extending leaf spring 2 attached to the corresponding arm 13, so that when a. pull is exercised upon the connecting rods 20 the polishing device is pulled through the intermediary of the leaf springs 2 1 against the rolls l1 and 12. At the end opposite to the hook 23, each connecting rod has secured thereto a chain 25, the free end of which is attached to a ratchet member 26 carried at the front of the corresponding standard 10; so that when said ratchet mem her is rotated, the chain 25 is tightened and the polishing device pulled toward the rolls. Pivoted co-aXially with the ratchet member 26 on each side of the machine, is a lever 27 having a ratchet head 28, which latter is movable vertically into and out of operative engagement with the ratchet member 26. A hook 29 is provided at each side of themachine for retaining the corresponding lever 27 after it has been swung over in the manner to be hereinafter described.

In the use of the device, when it is desired I completed,

to affect a polishing operation, the polishing frame is moved toward the rolls, and the connecting rods 20 are then placed in position with the ends 22 of the arms 13 located in the slots 21 and the springs as engaging the hooks 23 (Fig. 1). The levers 27 are then raised out of engagement with the ratchet members 26, swung inwardly toward each other, depressed into a cooperative relation with the ratchet members 26, and then swung outwardly and secured by the hooks 29. The outward swinging of the levers 27 draws the polishing device toward the rolls, placing an initial compression on the leaf springs 24L. With the parts in this condition, the polishing operation is performed. When such operation has been the levers 27 are thrown inwardly, thereby relieving the connecting rods 20 from tension and permitting the polishing device to be pulled back out of operative position by the springs 19.

It sometimes occurs during the polishing operation that one of the rolls breaks, the effect being that a portion of the roll-face falls outwardly to a certain extent. VVithout the provision of any safety means, the effect of this occurring to the upper ro-ll would be that the polishing device would be wrecked. In the use of the mechanism described above, the portion falling away from the upper roll strikes the emery block 17 and forces the polishing device outwardly against the ends of the springs 24. \Vhen the polishing device has been forced out to a certain extent, the ends of the springs 24 slip out from their engagement with the hooks 23, thereby freeing the arms 18 from the connecting rods 20, and permitting the polishing device to be pulled back out of harms way by the spring 19. In this way the polishing device is pulled back out of operative position before there has been any time for material damage to be done thereto.

hat I claim is 1. In combination, a polishing device, means for retaining said device in operative position, and connecting means between said retaining means and said polishing de- Gopies 01; this patent may be obtained for five cents each, by addressing the vice, said connecting means being releasable upon an undue pressure being exercised on said polishing device.

2. The combination with a rolling mill, of a device for polishing the rolls thereof, said polishing device including a pivoted frame, polishing means carried by said frame, releasable means normally retaining said frame in operative position with respect to the rolls, and means for permitting the releasing of said retaining means upon an undue pressure being exerted on said polishing means.

3. The combination with a rollingmill including a pair of standards and mill-rolls between said standards, of a polishing device for said rolls, said polishing device comprising a pair of frame-arms pivoted to said standards, polishing means carried by said frame arms, means tending to withdraw said polishing device from said rolls, and releasable means normally retaining said polishing device in operative position with respect to the rolls, and means for permitting the releasing of said retaining means upon an undue pressure being-exerted upon said polishing means, thereby to permit the polishing device to be withdrawn from the rolls.

1. The combination with a rolling mill including a pair of standards and mill rolls between the standards, of a polishing device for said 7 rolls, said polishing device comprising a pair of frame-arms pivoted to said standards, polishing means carried by said frame-arms, means tending to withdraw said polishing device from said rolls, movably mounted retaining rods formed with hook-portions andwith slots for receiving the upper and springs carried by said frame-arms and engaging said hook-portions.

In testimony whereof, I the said BRIOE P. SwYERs, have hereunto setmy hand.

BRICE P. Sl/VYERS Commissioner of Patents,

Washington, D. 0.

ends of said frame-arms, 

